Amidomethyl-substituted 2-(4-sulfonylamino)-3-hydroxy-3,4-dihydro-2H-chromen-6-yl compounds, a process and intermediates for their production, and pharmaceutical compositions containing them

ABSTRACT

Compounds corresponding to formula I:  
                 
 
in which R 1 , R 2 , R 3 , R 4 , R 5  and R 6  have the meanings given in the description; a process for the preparation of these compounds; intermediate products used to prepare such compounds, and pharmaceutical compositions containing such compounds.

BACKGROUND OF THE INVENTION

The present invention relates to novel amidomethyl-substituted2-(4-sulfonylamino)-3-hydroxy-3,4-dihydro-2H-chromen-6-yl derivativeswith a potassium channel-blocking effect, in particular with an effectinfluencing the cardiovascular system, and also to medicamentscontaining these compounds. Furthermore, the invention relates to aprocess for the preparation of the novel compounds and intermediateproducts of this process.

Indanes, benzopyrans and analogues of such compounds which havepotassium channel-blocking effects, and in particular effectsbeneficially influencing the cardiovascular system, are known from U.S.Pat. No. 6,150,356 (═WO 00/12077).

Published international application no. WO 00/58300 discloses chromanderivatives which are suitable as medicaments, in particularantiarhythmically effective medicaments.

SUMMARY OF THE INVENTION

It was an object of the present invention to provide newpharmaceutically active substances useful for treating diseaseconditions.

Another object of the invention was to provide active substances usefulin treating cardiovascular diseases, especially cardiac arrhythmias.

A further object of the invention was to provide pharmaceutically activesubstances characterized by high effectiveness and patient tolerability.

It is also an object of the invention to provide active substances whichexhibit an antiarrhythmic activity with a marked atrial-selectiveactivity profile. These and other objects have been achieved inaccordance with the present invention by providing a compoundcorresponding to formula I:

wherein

-   R¹ is C₁₋₄-alkyl,-   R² is C₁₋₄-alkyl,-   R³ is phenyl which is optionally substituted 1 or 2 times by    halogen, C₁₋₄-alkyl, C₁₋₄-alkoxy or trifluoromethyl; naphthyl or    biphenyl,-   R⁴ is hydrogen; C₁₋₆-alkyl or C₃₋₇cycloalkyl-C₁₋₄-alkyl,-   R⁵ is hydrogen, and-   R⁶ is C₁₋₆-alkyl; phenyl-C₁₋₄-alkyl, the phenyl group of which is    optionally substituted once by halogen; furyl-C₁₋₄-alkyl or    tetrahydronaphthyl, or-   R⁵ and R⁶, together with the nitrogen to which they are bonded, form    a piperazine ring which may optionally be substituted by phenyl.

It has now surprisingly been found that a group of novelamidomethyl-substituted2-(4-sulfonylamino)-3-hydroxy-3,4-dihydro-2H-chromen-6-yl compoundsaccording to the invention possess potassium channel-blocking propertiesand are suitable for the treatment of cardiovascular diseases,preferably for the treatment of cardiac arrhythmias. The compoundsaccording to the invention are distinguished by high effectiveness withgood compatibility and in the case of anti-arrhythmic action also by amarked atrial-selective action profile. In addition, the compoundsaccording to the invention have properties which lead one to expect anadditional effect influencing the immune system.

The invention thus relates to novel amidomethyl-substituted2-(4-sulfonylamino)-3-hydroxy-3,4-dihydro-2H-chromen-6-yl compoundscorresponding to formula I:

wherein

-   R¹ is C₁₋₄-alkyl,-   R² is C₁₋₄-alkyl,-   R³ is phenyl, which is optionally substituted 1 to 2 times by    halogen, C₁₋₄-alkyl, C₁₋₄-alkoxy or trifluoromethyl; naphthyl or    biphenyl,-   R⁴ is hydrogen; C₁₋₆-alkyl or C₃₋₇-cycloalkyl-C₁₋₄-alkyl,-   R⁵ is hydrogen, and-   R⁵ is C₁₋₆-alkyl; phenyl-C₁₋₄-alkyl, the phenyl group of which is    optionally substituted once by halogen; furyl-C₁₋₄-alkyl or    tetrahydronaphthyl, or-   R⁵ and R⁶, together with the nitrogen to which they are bonded, form    a piperazine ring which may optionally be substituted by phenyl.

Furthermore, the invention relates to pharmaceutical compositionscontaining the compounds of Formula I. Furthermore, the inventionrelates to a process for the preparation of the compounds of Formula Iand to intermediate products of this process.

Whenever the compounds of Formula I or other compounds described withinthe context of the present invention include substituents consisting ofor comprising C₁₋₄-alkyl or C₁₋₆-alkyl groups, these groups may each bestraight-chain or branched.

R¹ and R² preferably each have the meaning methyl.

R³ preferably has the meaning phenyl which is optionally substituted 1to 2 times by halogen, C₁₋₄-alkyl, C₁₋₄-alkoxy or trifluoromethyl. Inparticular, R³ has the meaning of phenyl substituted once by C₁₋₄-alkyl.Where R³ is halogen-substituted phenyl, fluorine, chlorine, bromine andiodine are considered as halogen. As a particularly preferred meaning,R³ stands for 4-ethylphenyl.

R⁴ is preferably hydrogen, C₁₋₆-alkyl or cyclopropyl-C₁₋₄-alkyl, inparticular cyclopropylmethyl. Where R⁴ stands for C₁₋₆-alkyl, this is inparticular branched and preferably represents neopentyl,2,2-dimethylbutyl, 2-ethylbutyl, 3-methylbutyl or 2-methylpropyl.

R⁵ is preferably hydrogen.

R⁶ preferably has the meanings phenyl-C₁₋₄-alkyl, in particular benzylor phenethyl, or the meaning tetrahydronaphthyl, in particular1-tetrahydronaphthyl. (R)-1-tetrahydronaphthyl is preferred.

Particularly preferred compounds of Formula I are selected from thegroup consisting of:

-   2-(4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-yl    acetamide;-   2-((3S,4R)-4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-[(1R)-1,2,3,4-tetrahydronaphth-1-yl]acetamide;-   N-benzyl-2-{4-[[(4-ethylphenyl)sulfonyl](neopentyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}acetamide;-   2-{4-[[(4-ethylphenyl)sulfonyl](neopentyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}-N-(2-phenylethyl)acetamide,    and-   2-(4-{[(4-methylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-yl    acetamide.

According to the invention, the novel compounds of Formula I areobtained by reacting a compound corresponding to formula II:

wherein R¹, R², R⁴, R⁵, and R⁶ have the above meanings,with a compound corresponding to formula III:X—SO₂—R³  IIIwherein R³ has the above meaning and X is a cleavable leaving group. Thereaction can be carried out using a conventional wet-chemical process inan organic solvent which is inert under the reaction conditions, inparticular a dipolar-aprotic solvent such as dichloromethane or in amixture of such solvents and in the presence of a base. Suitable basesinclude non-nucleophilic organic nitrogen bases such as tertiary loweralkylamines, for example triethylamine. Liquid organic bases used inexcess can also be used as solvents. If desired, the reaction can becatalyzed by a known coupling aid such as 4-N,N-dimethylaminopyridine(=DMAP). Suitable reaction temperatures are between room temperature and80° C., for example 65° C. Suitable reaction pressures are betweennormal pressure and approximately 200 bar, for example 180 bar. If thecompound of Formula III which is used is liquid, it may be advantageousto remove the solvent used from the reaction mixture after the additionof the compound of Formula III to the compound of Formula II dissolvedin the solvent in known manner, for example at reduced pressure.Whenever in the starting compounds of Formula II R⁴ stands for hydrogen,it is advantageous to use equimolar amounts of compound of Formula III.Usually halogen, preferably chlorine or bromine, is used as leavinggroup X in compounds of Formula III.

Furthermore, the reaction of a compound of Formula II with a compound ofFormula III can also be performed in known manner on a solid phase, inparticular on a reactive resin such as aminomethyl polystyrene (AMPS).This reaction variant can preferably be used for the preparation ofsmaller amounts of substance, for example on a scale of 1 to 10 mmol.Where synthesis is on a solid phase, preferably a readily filterablebase such as known polymer-supported methylpiperidine (═PSmethylpiperidine) can be used as base. Suitable reaction temperaturesfor solid-phase synthesis are between 10° C. and 40° C., preferably roomtemperature. Compounds of Formula I may be isolated in known manner fromthe reaction mixture and if necessary purified in known manner.

Compounds of Formula II can be prepared by reacting an epoxide compoundcorresponding to formula IV:

wherein R¹, R², R⁵ and R⁶ have the above meanings, in known manner witha nucleophilic organic nitrogen compound, preferably ammonia in aqueoussolution, in a dipolar-protic solvent such as a lower-alkyl alcohol,preferably ethanol. Suitable reaction temperatures are between roomtemperature and 60° C.

Where compounds of Formula II are desired in which R⁴ representsC₁₋₆-alkyl or C₃₋₇-cycloalkyl-C₁₋₄-alkyl, the resulting compound ofFormula II, in which R⁴ represents hydrogen, can then be alkylated inknown manner. The alkylation can be carried out in particular as anaminoalkylation, by first reacting the compound of Formula II, in whichR⁴ stands for hydrogen, with an aldehyde corresponding to formula V:R⁴⁰¹—CHO  Vwherein R⁴⁰¹ is hydrogen, C₂₋₅-alkyl or C₃₋₇-cycloalkyl-C₀₋₃-alkyl, andthen reducing the resulting !mine intermediate product by addition of areducing agent to the alkylamine compound of Formula II. Examples ofsuitable reducing agents include complex borohydrides such as NaBH₃CN orknown polymer-supported borohydride (═PS—BH₄).

In a first variant, the reaction can be carried out in a polar-proticorganic solvent which is inert under the reaction conditions, inparticular methanol, the reduction of the imine being performed in situwithout isolating it in the same solvent. Suitable reaction temperaturesfor this variant are between room temperature and 60° C., for example50° C. In a second variant, the reaction of the compound of Formula II,wherein R⁴ stands for hydrogen, with an aldehyde of Formula V to formthe imine intermediate product can be carried out in a dipolar-aproticsolvent, in particular tetrahydrofuran (=THF). In that case, it isadvantageous to add catalytic amounts of a hydrophilic agent, forexample an orthoester, in particular trimethyl orthoformate (=TMOF), tospeed up the reaction. Then the imine intermediate product can beisolated and taken up in a polar-protic solvent stated above for thefirst variant, in order to perform the reduction in this solvent. Thissecond variant may preferably be carried out at room temperature. In thenucleophilic ring-opening reaction of epoxides of Formula IV describedabove in two variants, as a rule compounds of Formula II are obtained inwhich the vicinal substituents in position 3 and in position 4 of thepyran ring, namely the hydroxyl group and the amino group, are each inthe trans position to one another.

The compounds of Formula II are themselves novel compounds which areadvantageously suitable as intermediate products for the preparation ofnovel pharmacologically active substances, for example for thepreparation of the compounds of Formula I.

Compounds of Formula III and compounds of Formula V are known per se orcan be prepared in known manner from known compounds.

Compounds of Formula IV can be prepared by reacting a compoundcorresponding to formula VI:

wherein R¹, R², R⁵ and R⁶ have the above meanings, in known manner witha peroxide compound capable of epoxide formation, preferably withm-chloroperbenzoic acid (MCPBA), in an organic polar-aprotic solventwhich is inert under the reaction conditions, preferablydichloromethane, and in the presence of a base. An example of aparticularly suitable base is an aqueous solution of sodium hydrogencarbonate. The reaction may preferably be carried out at roomtemperature.

Compounds of Formula I have at least in the vicinal carbon atoms inposition 3 and in position 4 of the pyran ring in each case anasymmetric center or chiral center and can therefore occur in severalisomeric forms. The invention includes both the isomerically purecompounds of Formula I and mixtures of these isomers. The opticallyactive compounds of Formula I can be obtained, for example, from themixtures of the isomers of Formula I or from mixtures of the isomers ofFormula II in known manner, e.g. by chromatographic separation on chiralseparating materials. Mixtures of the isomers of Formula II can also beobtained by reaction with suitable optically active acids, e.g.camphorsulfonic acid or D- or L-tartaric acid, and subsequentfractionation into the respective optical antipodes by fractionalcrystallization of the resulting salts.

The optically active compounds of Formula I can also be prepareddirectly by chiral synthesis. Where compounds of Formula I are to beprepared wherein the hydroxy substituent in position 3 of the pyran ringand the R⁴NSO₂R³-substituent in position 4 of the pyran ring are in astereochemically defined trans position to one another, in each case thestarting point may be epoxides of Formula IV in which the appropriatestereochemistry is already predetermined. Epoxides of Formula IV withcorrespondingly predetermined stereochemistry can for example beprepared by epoxidizing alkenes of Formula VI in known manner with theaid of a chiral catalyst in accordance with the method of Jacobsen, U.S.Pat. No. 5,637,739 (=EP 521,099). Where for example a compound ofFormula I is to be prepared in which the chiral center in position 3 ofthe pyran ring is in the S configuration and in which the chiral centerin position 4 of the pyran ring is in the R configuration, anintermediate product of Formula VI can be reacted in the presence of achiral catalyst, in particular (S,S)-manganese (III) salen and in thepresence of an oxygen donor, in particular sodium hypochlorite inaqueous solution, in an organic solvent which is inert under thereaction conditions, in particular dichloromethane. The reaction mayadvantageously be carried out at a pH value between 9.5 and 11.5. To seta suitable pH value, preferably a buffer consisting of Na₂HPO₄ andpyridine-N-oxide can be added to the reaction mixture. Suitable reactiontemperatures are between −10° C. and room temperature, preferably at 0°C. Where a compound of Formula I is to be prepared in which the chiralcenter in position 3 of the pyran ring is in the R configuration and inwhich the chiral center in position 4 of the pyran ring is in the Sconfiguration, the procedure can be analogous to the directionsdescribed above, but (R,R)-manganese (III) salen is then used instead of(S,S)-manganese (III) salen.

Compounds of Formula VI can be prepared by reacting a compoundcorresponding to formula VIII:

wherein R¹ and R² have the above meanings,with a compound corresponding to formula VIII:HNR⁵R⁶  VIIIwherein R⁵ and R⁸ have the above meanings, in a manner known foraminoacylation. The carboxylic acids of Formula VII or their reactivederivatives such as acid halides, in particular acid chlorides or acidbromides, may be used as acylation agents. If the acids of Formula VIIthemselves are used as acylation agents, the reaction thereof with theamino compounds of Formula VIII can advantageously also be carried outin the presence of a known coupling reagent, for example1,1-carbonyldiimidazole, ethyl chloroformate or an alkyl carbodiimide,e.g. N′-(3-dimethylaminopropyl)-N-ethylcarbodiimide (=EDC), or acycloalkyl carbodiimide such as dicyclohexylcarbodiimide. The acylationmay take place in an organic solvent which is inert under the reactionconditions at temperatures from −30° C. to +50° C., preferably at roomtemperature. Suitable solvents include halogenated hydrocarbons such asdichloromethane and cyclic ethers such as tetrahydrofuran or dioxane ormixtures of these solvents.

Compounds of Formula VII can be prepared by hydrolyzing the ester groupof a compound corresponding to formula IX:

wherein R¹ and R² have the above meanings, and R⁷ is C₁₋₄-alkyl, inknown manner. The hydrolysis can be carried out, for example, in apolar-protic solvent such as ethylene glycol by contacting with a base,for example a strong base such as dilute aqueous sodium hydroxidesolution. Suitable reaction temperatures are between room temperatureand the boiling point of the solvent or of the solvent mixture.

Compounds of Formula IX can be prepared by reacting a compoundcorresponding to formula X:

wherein R⁷ has the above meaning, with a compound corresponding toformula XI:

wherein R¹ and R² have the above meanings, in known manner. The reactioncan be carried out in an organic solvent which is inert under thereaction conditions, such as toluene or xylene and in the presence of anacid with water being separated by azeotropic distillation. Examples ofsuitable acids include acetic acid or propionic acid. Advantageously,the reaction is carried out with the addition of a catalyst such as aLewis acid, for example phenylboronic acid. Suitable reactiontemperatures are between room temperature and the boiling point of thesolvent or of the solvent mixture, for example around 120° C.

The compounds of Formula X and Formula XI are known per se or can beprepared in known manner from known compounds.

The advantageous effects of compounds of Formula I as pharmacologicallyactive substances will become apparent from the following background. Itis already known that substances which block endogenous cardiacpotassium channels can be used as active substances to countercardiovascular diseases, in particular to counter cardiac arrhythmias.By blocking outward-directed potassium currents in the heart, aprolongation of the action potential of the heart can be brought aboutwhich has a beneficial effect on antiarrhythmic heart conditions.Examples of this known treatment are Class III antiarrhythmic drugs.

One problem of such non-specific potassium channel blockers is their lowdegree of selectivity with respect to their effect on different hearttissues. Thus for a relatively long time it has been assumed that inparticular Class III antiarrhythmic drugs can lead to undesirableprolongation of the QT interval in the electrocardiogram (=ECG) and topolymorphic ventricular tachycardias (“torsades de pointes”), which cantrigger ultimately undesirable complications such as for exampleventricular fibrillation. For this reason, potassium channel blockershave been sought which are capable of selectively influencing thepotassium currents of the atrium, but not of the ventricle. Since theK_(v)1.5-potassium channels in the heart which were discovered some timeago are located exclusively in the atrium, but not in the ventricle, itcan be assumed that these K_(v)1.5-potassium channel-blocking compoundsare suitable as atrial-selective antiarrhythmic drugs.K_(v)1.5-potassium channels and other potassium channels are howeverlocated not only in the heart, but e.g. also in vessels of the body.Therefore it cannot always be ruled out that K_(v)1.5-potassiumchannel-blocking compounds may lead to increases in blood pressureresulting from the blockade of potassium channels in the vessels.K_(v)1.5-potassium channel-blocking compounds which are free ofside-effects which raise blood pressure are therefore preferred. Furtherundesirable side-effects which may occur on administration of manyK_(v)1.5-potassium channel-blocking compounds are additional ClassI-antiarrhythmic side-effects and also negatively inotropic effects.

The compounds of Formula I are distinguished by an effect whichparticularly pronouncedly and selectively blocks the cardiacK_(v)1.5-potassium channels. In addition to particularly goodeffectiveness and a marked atrial-selective antiarrhythmic activityprofile, the compounds of Formula I at most have slight undesirableside-effects such as increase in blood pressure, Class I-antiarrhythmicside-effects and negatively inotropic effects. The compounds of FormulaI are therefore indicated for the treatment and/or prophylaxis ofcardiovascular diseases, in particular atrial fibrillation, atrialflutter and other cardiac arrhythmias, in larger mammals and humans.

Furthermore, the compounds of Formula I exhibit a clear effect ofblocking the K_(v)1.3-potassium channels. K_(v)1.3-potassium channelsare preferentially located in cells of the immune system. A connectionis made between blockade of the K_(v)1.3-potassium channels and interalia an anti-proliferative and/or immunosuppressive effect (cf. C.Beeton et al., The Journal of Immunology 166 (2001) 936-944). It cantherefore be assumed of compounds which are capable of blockingK_(v)1.3-potassium channels—for example the compounds of Formula I—thatthey are also suitable for the treatment and/or prophylaxis ofproliferative, chronic inflammatory and autoimmune diseases such asmultiple sclerosis.

DESCRIPTION OF PHARMACOLOGICAL TEST METHODS

The cited example numbers relate to the subsequent preparation examples.

1. In-Vitro Investigation of the K_(V)1.5-Potassium Channel-BlockingEffect of the Substances

The K_(v)1.5-potassium channel-blocking effect of the substances wasdemonstrated in a known test model or analogously to this test model(cf. W. Hu et al., J. Pharmacol. Toxicol. Methods 34 (1995) 1-7). Inthis test model, a cell line of egg cells of the Chinese hamster(=“Chinese hamster oocytes”, “CHO”) is used which originates from asingle cell and stably expresses the K_(v)1.5-channel. By incubationovernight in a nutrient medium containing RbCl or a “loading buffer”(all values in mM: RbCl 5, NaCl 140, CaCl₂ 2, MgSO₄ 1, HEPES buffer 10,glucose 5) the aforementioned oocytes are loaded with Rb⁺ under theinfluence of Na⁺/K⁺-ATPase. Thereafter, a portion of the oocytes isincubated as a reference standard in the absence of an inhibitor, whileanother portion of the oocytes is incubated in the presence of therespective inhibitory test substance of Formula I. Then the oocytes aredepolarized by increasing the extracellular potassium-ion concentration,which causes the K_(v)1.5-potassium channels of the oocytes to open. Inthe absence of an inhibitor, the Rb⁺ ions flow through theK_(v)1.5-potassium channels into the liquid surrounding them. In thepresence of an inhibitory test substance of Formula I, on the otherhand, the Rb⁺ ions remain locked within the oocytes. The extent of theK_(v)1.5-potassium channel-blocking effect of the test substances ofFormula I is determined by measuring the Rb⁺ ion concentration in theliquid surrounding them by means of atomic absorption spectroscopyagainst a reference standard.

Chinese hamster oocytes (see above) were cultivated in a known,RbCl-containing nutrient medium for CHO-cells and placed in the samplewells of a 96-sample capacity sample plate (“96 well plate”). Theoocytes were allowed to grow overnight in order to obtain monolayers ofthe oocytes. Then the nutrient medium was pipetted off, and each samplewell was washed three times with 100 μl portions of a preincubationbuffer of low potassium-ion concentration (all values in mM: KCl 5, NaCl140, CaCl₂ 2, MgSO₄ 1, HEPES buffer 10, glucose 5). Then 50 μl of asolution of the respective test substance (stock solution in DMSO,dilution with preincubation buffer, final concentration in the testbatch 10 μM) or of the solvent (as negative controls) was added to eachsample well and incubated for 10 min. in each case at room temperature.Then 50 μl of a stimulation buffer with elevated potassium-ionconcentration (KCl 145 mM, NaCl 0 mM, otherwise as preincubation buffer)was added to each sample well and the samples were then incubated for afurther 10 min. at room temperature. In each case, 80 μl of the liquidsurrounding the oocytes from each sample well was then transferredseparately to the sample wells of an analysis sample plate, and the Rb⁺ion concentration in the liquids was determined by atomic absorptionspectroscopy. The test substances were each double-tested. The signalsection which represented the K_(v)1.5 component of the Rb⁺ outflow wasdefined by using as positive control the known potassium channel blocker4-AP in a high concentration (100×IC₅₀ for the K_(v)1.5 channel). Thismade it possible to determine which portion of the Rb⁺ outflow wasdependent on the influence of the 4-AP and therefore is to be assignedto the K_(v)1.5 channel. For the substances which in the concentrationof 10 μM used led to a reduction in the Rb⁺ outflow of at least 50%,additional tests were performed with lower concentrations of the testsubstances in order to be able to determine the half-maximum effectiveconcentration. In each case the concentration of half-maximum inhibitionof the test substances of Formula I (IC₅₀) was given as characteristicvariable.

In this test model the test substances of Formula I listed in thefollowing Table 1 had the IC₅₀ values given in the table. TABLE 1K_(v)1.5-potassium channel-blocking effect of the test substances invitro Example No. IC₅₀ 2 2.0 4 1.6 6 5.0 7 1.5 8 0.5 9 2.9 10 1.6 11 3.212 3.2 13 6.5 15 4.0 16 6.3 17 2.65 18 2.7 19 2.5 20 2.9 21 3.3 22 3.423 4.3 24 5 25 5.2 26 5.2 27 5.62. In-Vitro Investigation of the K_(v)1.3-Potassium Channel-BlockingEffect of the substances

The K_(v)1.3-potassium channel-blocking effect of the substances wasdemonstrated in a known test model (e.g. from Genion, Hamburg) oranalogously to this test model (cf. J. Plásek and Sigler, J. Photochem.Photobiol. 33 (1996) 101-124). In this test model, known oocytes of theChinese hamster (═CHO) are used which are stably transfected with theK_(v)1.3-potassium channel. The blockade of the cell-inherentK_(v)1.3-potassium channel activity in the transfected cells isaccompanied by a positive shift in the membrane potential from approx.−40 mV to −30 mV, whereas in the wild-type CHO cells investigated inparallel no significant shift in the membrane potential is triggered. Achange in the membrane potential is thus connected to the reduction inthe K_(v)1.3-potassium channel activity. By blocking theK_(v)1.3-potassium channels e.g. with substances of Formula I and theresulting change in the membrane potential, an accumulation of amembrane potential-sensitive fluorescent dye in intracellularcompartments of the oocytes and ultimately increasing fluorescenceoccurs. The change in the membrane potential of the oocytes is thereforemeasured indirectly via the increase in fluorescence of the membranepotential-senstive dyes.

The cells were transfected with the K_(v)1.3 plasmid in known mannerwith a commercially obtainable transfection reagent (DMRIE-C from GibcoBRL, Germany). The successful transfection was verified byimmunofluorescence and by “patch-clamp” investigations of the potassiumion current. The fluorescence measurements were performed on a TecanSafire fluorescence reader from Tecan, Germany. In each case, theincrease in the fluorescent intensity caused by the blockade of theK_(v)1.3-potassium channels in the oocytes with substances of Formula Iin a concentration of 10 μM was determined as characteristic variable.The increase in the fluorescent intensity was given in each case inpercent (%) compared with an increase in the fluorescent intensitycaused by the reference substance margatoxin. Margatoxin is known as aselective K_(v)1.3-potassium channel blocker (see e.g. M. Farcia-Calvoet al., J. Biol. Chem. 268 (1993) 18866-18874).

In this test model the test substances of Formula I listed in thefollowing Table 2 had the percentages given in the table: TABLE 2K_(v)1.3-potassium channel-blocking effect of the test substances invitro Increase in the fluorescent intensity Example No. (% margatoxin) 272 5 97 6 82 9 107 10 82 11 99 12 111 13 53 17 72 18 141 19 171 20 97 2186 22 71 23 413. Investigation of the Functional Effectiveness of the Substances onthe Atrium of Rats' Hearts In Vitro

The functional antiarrhythmic effectiveness of the substances wasdemonstrated in the test model set forth below. In this test model it isdetermined to what extent the K_(v)1.5-blocking substances of Formula Iresult in a prolongation of the functional refractory period in the leftatrium of rats. The refractory period is the minimum possible elapsedtime between the basic stimulus and additional stimulus in which arenewed contraction can be triggered. The extent of the prolongation ofthe functional refractory period is a measurement of the antiarrhythmiceffectiveness of the substances according to the invention. Thefunctional refractory period is determined by testing on theelectrically stimulated preparation at what elapsed time from thepreceding contraction a renewed contraction can be triggered byadditional electrical stimuli.

The hearts were removed from freshly sacrificed rats (Sprague-Dawley,Charles-River, Germany). The left atria were isolated and fastened toforce transducers in a temperature-controlled (30° C.), gasified (O₂95%, CO₂ 5%) organ bath which was filled with modified Tyrode solution(all values in mM: NaCl 137; KCl 2.7; CaCl₂ 1.8; MgCl₂ 0.8; NaHCO₃ 11.9;NaH₂PO₄ 0.6; glucose 5). In order to trigger regular contractions, thepreparations were electrically stimulated (rectangular pulses, pulsemagnitude 3.5× threshold stimulus, pulse width 1.5 ms, frequency 1 Hz).Initially, the initial value of the functional refractory period wasdetermined by applying extra pulses in addition to the basic stimulus,the elapsed time from the preceding basic stimulus being shortened untilno further additional contraction could be triggered. Then thecumulative addition of increasing concentrations (0.1-10 μM) of thesubstances of Formula I took place at intervals of 20 min. each, therefractory period being determined again in each case 18 min. after theaddition had taken place. Before the measurement, stock solutions of thetest substances (3.2 and 0.32 mM in 100% DMSO) were prepared. In orderto achieve the desired final concentrations of the substances (0.1-10μM) in the organ bath (volume 100 ml), corresponding volumes of thesestock solutions were then poured into the organ bath.

In each case the prolongation of the functional refractory period (FRP)in the left atrium of the rats' hearts in milliseconds observed afterthe addition of 10 μM of the respective substance of Formula I to theatrial preparations was given as characteristic variable.

In this test model the test substances of Formula I listed in thefollowing Table 3 exhibited the prolongations of refractory period givenin the table, with higher values representing a stronger antiarrhythmiceffectiveness: TABLE 3 FRP-prolonging effect of the test substances (10μM) on the left atria of rats' hearts in vitro Example No. FRPprolongation [ms] 1 15 2 20 4 17 7 24 8 17 9 30 10 20 11 24 12 14 13 2814 22 15 30 16 204. Investigation of the Functional Effectiveness of the Substances onGuinea-Pig Hearts In Vivo

In the test model shown below, it was shown that the substancesaccording to the invention at most have slight undesirable proarrhythmiceffects on repolarization in the ventricle. To this end, the influenceof the compounds of Formula I on the effective refractory period (ERP)and other influencing variables on guinea-pig hearts in vivo wereinvestigated. In this test model, non-selective potassium channelblockers not in accordance with the invention, which also block HERGand/or K_(v)LQT1 channels, result in undesirable prolongation of the ERPand the QT time on an electrocardiogram (=ECG). The QT time is likewisea measurement of the repolarization in the heart. Prolongations of boththe ERP and the QT time, respectively, which are due to the substanceswere independently interpreted as indications of the risk of theoccurrence of undesirable torsade-de-pointes arrhythmias. Furthermore,the QRS interval also was determined in each case from the ECG as ameasurement of the ventricular rate of spread of stimulus. Even aprolongation of the QRS interval caused by a test substance is connectedwith an increased risk of undesirable pro-arrhythmic side-effects.Therefore in this test model the lack of an ERP and QT time prolongationsignifies a low risk, but the occurrence of a relevant ERP and QTprolongation on the other hand signifies an elevated risk of undesirablepro-arrhythmic effects. Also the lack of a prolongation of the QRSinterval which is due to the substances due to the substances of FormulaI investigated indicates a low risk of undesirable pro-arrhythmicside-effects, since lack of QRS prolongation indicates an undisturbedspread of stimulus in the ventricle. Conversely, a QRS prolongation,which is typically triggered by Class I antiarrhythmic drugs indicatesslowing of the conduction rate and may promote the occurrence ofventricular tachycardias to ventricular fibrillation.

Male guinea pigs (Dunkin-Hartley from Charles River) were anaesthetized(ketamine 50 mg/kg, xylazine 10 mg/kg) and each of them was providedwith a venous access via one jugular vein for administration ofcompounds of Formula I or a vehicle. A bipolar stimulation catheter wasfed into the right ventricle of the guinea pigs via the other jugularvein (stimulation frequency 5 Hz). The arterial blood pressure wasmeasured by a catheter located in the carotid artery which was connectedto a Statham pressure transducer. The ECG was recorded via needleelectrodes. The measured data were digitized via an analog/digitalconverter, recorded on a computer with suitable software (PonemahPhysiology Platform from Gould, USA) and printed out in parallel on amultichannel printer. After an equilibration period of 45 min.,increasing doses of the compounds of Formula I or of the vehicle wereadministered intravenously (=i.v.) to the guinea pigs at 12-minuteintervals. Before the first administration and in each case one minuteafter administration of increasing doses (0.1−max. 30 μmole/kg) of thesubstances of Formula I, the effective refractory period was measured.For this, after five normal stimuli in each case an additional pulse wasapplied and the elapsed time thereof from the preceding pulse wasincreased until a heart action was triggered. The observed time intervalcorresponds to the ERP of the ventricular myocardium.

In order to detect possible effects of the test substances on the bloodpressure, in the same test model after each administration of substancethe systolic and diastolic blood pressure was determined and comparedwith the previous blood-pressure level. The parameters were recordedautomatically 1 and 8 min. after each administration of substance. Table4 also shows changes in systolic blood pressure due to the compounds ofFormula I given below (minus effects due to the vehicle). None of thecompounds listed resulted in a significant blood pressure increase.

In this test model, the test substances of Formula I listed in thefollowing Table 4 had the effects given in the table. Only statisticallysignificant effects were listed, with a t-test with a significance limitof P<0.05 being used for the statistical testing. In Table 4, theindication “n.s.” (=“not statistically significant”) means that thesubstance of the corresponding example does not have any statisticallysignificant influence on the measured variable listed. TABLE 4 Effect ofthe test substances (1 min. after administration of 10 μmole/kg i.v.) onthe ERP, QT and QRS intervals in the ventricle of guinea pigs andsimultaneously measured changes in the systolic blood pressure in vivo(n.s. = not statistically significant, negative values indicateshortening or reduction) syst. blood ERP QT QRS pressure Ex. No. (ms)(ms) (ms) (mm Hg) 1 n.s. n.s. n.s. n.s. 2 n.s. n.s. n.s. n.s. 4 n.s.n.s. n.s. n.s. 7 −8.2 n.s. n.s. −15.3 8 n.s. n.s. n.s. −10.7 10 −8.0n.s. n.s. −15.9 11 n.s. n.s. n.s. n.s. 12 n.s. n.s. n.s. n.s. 13 n.s.n.s. n.s. n.s. 16 −7.5 n.s. n.s.  −8.65. Investigation of the Functional Effectiveness of the Substances onthe Hearts of anaesthetised Cats In Vivo

In the test model shown below, it was shown that the substancesaccording to the invention at most have a marked atrial-selective effecton the heart. After administration of the substances according to theinvention, a significant increase in the atrial fibrillationthreshold—i.e. the current intensity at which atrial fibrillationoccurs—was observed. At the same time, on the other hand, theventricular fibrillation threshold is influenced only minimally.

Living cats were anaesthetised with chloralose/urethane (501300 mg/kgi.v.) and were ventilated with ambient air. Then, following thoracotomy,stimulating electrodes were attached to the right atrium and theventricle. The atrial and ventricular fibrillation threshold wasdetermined in known manner by administration of rectangular pulses ofincreasing current intensity until atrial or ventricular fibrillationoccurred (for performance see in detail: Br. J. Pharmac. 17 (1961) 167;Hdb. exp. Pharmacol. XVI/3 (1975) 131; Pharmacol. Res. 25 Suppl. 2(1992) 156). The test substances of Formula I were dissolved inpropylene glycol (80%) and administered intravenously in increasingdoses (5-30 μmol/kg). Atrial and ventricular fibrillation thresholdswere then determined at 5-minute intervals in known manner after theaddition of the respective dose. The increase in the respectivefibrillation threshold due to the substances investigated was expressedin percent of the value before administration of substance, i.e. adoubling of the fibrillation threshold corresponds to an increase of100%.

In this test model, the test substances of Formula I listed in thefollowing Table 5 had the effects given in the table. TABLE 5 Increasein the atrial (AFT) and ventricular fibrillation threshold (VFT) inanaesthetized cats in vivo (dose 30 μmol/kg i.v.) Selectivity factor Ex.No. AFT (%) VFT (%) (AFT:VFT) 1  66 22 3 2 261 15 17 4 226 19 12 9 21329 7 10 241 19 13

The particularly good physiological tolerability of the compoundsaccording to the invention can also be demonstrated in furtherpharmacological test models. Thus for example it can be demonstrated inan in vitro test on cardiac muscle preparations of guinea pigs that thecompounds of Formula I at most have slight Class I-side-effects.antiarrhythmic side-effects. Furthermore, it can be demonstrated in anin vitro model on rats'hearts and in another in vitro model on guineapigs' hearts that the compounds of Formula I at most cause slightnegatively inotropic effects.

The compounds of Formula I may be administered in conventionalpharmaceutical preparations. In an individual case, special dosage formsmay be indicated. The doses to be used may vary individually and willnaturally vary depending on the type of condition to be treated and thesubstance used. In general, however, pharmaceutical dosage forms with anactive substance content of 0.2 to 500 mg, in particular 10 to 200 mg,active substance per individual dose are suitable for administration tohumans and larger mammals. The compounds may be contained according tothe invention, together with conventional pharmaceutical auxiliariesand/or carriers, in solid or liquid pharmaceutical preparations.Examples of solid preparations include preparations which can beadministered orally, such as tablets, coated tablets, capsules, powdersor granules, or alternatively suppositories. These preparations maycontain conventional pharmaceutical inorganic and/or organic carriers,such as talcum, lactose or starch, in addition to conventionalpharmaceutical auxiliaries, for example lubricants or tabletdisintegrating agents. Liquid preparations such as suspensions oremulsions of the active substances may contain the usual diluents suchas water, oils and/or suspension agents such as polyethylene glycols andthe like. Other auxiliaries may additionally be added, such aspreservative, taste correctives and the like.

The active substances may be mixed and formulated with thepharmaceutical auxiliaries and/or carriers in known manner. For thepreparation of solid medicament forms, the active substances may forexample be mixed with the auxiliaries and/or carriers in conventionalmanner and may be wet or dry granulated. The granules or powder may bepoured directly into capsules or be pressed into tablet cores inconventional manner. These may be coated in known manner if desired.

The following examples are intended to illustrate the invention further,without limiting its scope.

EXAMPLE 12-(4-{[(4-Ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide

A) 25 g methyl-4-hydroxyphenylacetate, 14.5 ml 3-methylbut-2-enal and18.3 g phenylboronic acid were placed together under nitrogen atmospherein 1 l dry toluene and heated to boiling for 7 hours under refluxcooling. Then 60 ml glacial acetic acid was added to this receivingsolution at room temperature (=RT) and the mixture was again heated toboiling for 7 hours under reflux cooling. It was allowed to cool to roomtemperature, the solvent was largely evaporated at reduced pressure andthe remaining residue was poured into 300 ml of a 1:1 (v/v) mixture ofethyl acetate (=EA) and water. The pH value was adjusted to 5 byaddition of solid sodium bicarbonate, the organic phase was separatedoff and largely evaporated at reduced pressure. Chromatography of theremaining residue on silica gel (mobile phase: petroleum ether/EA 10:1v/v) yielded 16 g methyl-(2,2-dimethyl-2H-chromen-6-yl)acetate as paleyellow oil.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.15 (s, 3H) 1.27 (t, 3H) 1.43 (s, 3H)1.60-1.85 (3H) 1.97 (m, 1H) 2.66-2.82 (4H) 3.20-3.29 (3H) 3.54 (dd, 1H)4.23 (dd, 1H) 5.06 (m, 1H) 5.28 (d, 1H) 5.59 (d, 1H) 6.55 (d, 1H) 6.66(d, 1H) 6.97 (dd, 1H) 7.03-7.18 (4H) 7.35 (m, 2H) 7.87 (m, 2H); ¹³C-NMR(101 MHz, CDCl₃) δ [ppm]: 15.1 (q) 18.5 (q) 20.1 (t) 26.6 (q) 28.8 (t)29.2 (t) 30.2 (t) 42.9 (t) 47.7 (d) 55.1 (d) 74.8 (d) 78.7 (s) 117.9 (d)121.3 (s) 126.3 (d) 127.2 (s) 127.4 (d, 3 C) 128.2 (d) 128.8 (d) 128.9(d, 2 C) 129.3 (d) 130.3 (d) 136.5 (s) 137.6 (s) 137.7 (s) 150.2 (s)152.3(s) 170.3 (s).

B) 46 g of the methyl-(2,2-dimethyl-2H-chromen-6-yl)acetate obtainedabove (total amount from several analogous batches), 150 ml ethyleneglycol and 400 ml of a 20%-strength aqueous sodium hydroxide solutionwere heated to boiling for 3 hours in 440 ml tetrahydrofuran (=THF)under reflux cooling. Then the resulting mixture was allowed to cool toroom temperature, the solvent was largely evaporated at reducedpressure, and 200 ml tert. butylether and 300 ml water were added to theremaining residue. It was stirred for 10 min. and then the aqueous phasewas acidulated by addition of a 20%-strength aqueous hydrochloric acidsolution to pH 6. The aqueous phase was extracted twice with 300 mlportions of dichloromethane and the combined organic phases were driedover 20 g sodium sulfate. The solvent was largely evaporated at reducedpressure, petroleum ether was added to the remaining residue, and afirst resulting crystal fraction was filtered out from the solvent. Thefiltrate was concentrated again at reduced pressure, with anothercrystal fraction being produced. The combined crystal fractions weredried and 33.8 g 2,2-(dimethyl-2H-chromen-6-yl)acetic acid was obtained,which was used without further purification for the subsequent reaction.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.41 (s, 6H) 3.52 (s, 2H) 5.59 (d, 1H)6.27 (d, 1H) 6.72 (d, 1H) 6.88 (d, 1H) 6.99 (dd, 1H); ¹³C-NMR (101 MHz,CDCl₃) δ [ppm]: 28.1 (q, 2 C) 40.2 (t) 76.3 (s) 116.5 (d) 121.4 (s)122.1 (d) 125.3 (s) 127.2 (d) 129.9 (d) 131.1 (d) 152.3 (s) 177.8 (s).

C) 9.6 g 1,1-carbonyldiimidazole (=CDl) dissolved in 85 ml THF wasslowly added to a solution of 11.7 g of the 2,2-dimethyl-2H-chromen-6-ylacetic acid obtained above in 100 ml THF and stirred for 30 min. at roomtemperature. 8.8 ml 1,2,3,4-tetrahydro-1-naphthylamine, dissolved in 30ml THF, was dropped slowly into this receiving solution, the resultingmixture was stirred for 1 hour and left to stand overnight at roomtemperature. The solvent was largely evaporated at reduced pressure, andthe remaining residue was stirred with a mixture of diethyl ether andisopropanol (100:1 v/v) and crystallized. The resulting crystals wereremoved by suction and dried at 65° C. and 20 bar. Chromatography of thediethyl ether/isopropanol washing liquid on silica gel yielded furtherintermediate product, which was combined with the main quantity anddried. 17.5 g2-(2,2-dimethyl-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide was obtained as colorless solid, which was used withoutfurther purification for the subsequent reaction.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.41 (s, 6H) 1.60-1.85 (3H) 1.98-2.08(1H) 2.65-2.80 (2H) 3.45-3.55 (2H) 5.12-5.20 (1H) 5.60 (d, 1H) 5.66 (d,1H) 6.26 (d, 1H) 6.71 (d, 1H) 6.86 (d, 1H) 6.96 (dd, 1H) 7.02-7.07 (1H)7.08-7.17 (3H); ¹³C-NMR (101 MHz, CDCl₃) δ [ppm]: 20.2 (t) 28.0 (q, 2 C)29.2 (t) 30.3 (t) 43.2 (t) 47.7 (d) 76.3 (s) 116.8 (d) 121.7 (s) 122.0(d) 126.2 (d) 126.9 (s) 127.2 (d) 128.2 (d) 129.1 (d) 129.8 (d) 131.3(d) 136.7 (s) 137.5 (s) 152.2 (s) 170.7 (s).

D) 950 ml of a saturated aqueous sodium hydrogen carbonate solution wasadded to a solution of 11 g of the2-(2,2-dimethyl-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide obtained above in 600 ml dichloromethane. A total of 15 gm-chloroperoxybenzoic acid (=MCPBA) in three 5 g portions was added tothis receiving solution at 5 min. intervals, and the mixture was stirredfor 18 hours at room temperature. The organic phase was separated andsubstantially entirely evaporated on a rotary evaporator at 65° C. and20 bar.2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide was obtained as crude oil, which was used without furtherpurification for the subsequent reaction.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.23 (s, 6H) 1.56 (s, 6H) 1.63-1.85(6H) 1.97-2.10 (2H) 2.65-2.82 (4H) 3.43-3.56 (6H) 3.84-3.89 (2H)5.12-5.22 (2H) 5.62-5.72 (2H) 6.75 (d, 1H) 6.76 (d, 1H) 7.02-7.19 (10H)7.23-7.27 (2H); ¹³C-NMR (101 MHz, CDCl₃) δ [ppm]: 20.1 (t) 22.6 (q) 25.7(q) 29.2 (t) 30.2 (t) 43.1 (t) 47.7 (d) 50.8 (d) 62.7 (d) 73.2 (s) 118.6(d) 120.5 (s) 126.2 (d) 126.3 (d) 127.2 (d) 127.3 (d) 127.5 (s) 128.2(d) 128.3 (d) 129.2 (d) 130.5 (d) 131.1 (d) 131.2 (d) 136.5 (s) 137.5(s) 137.6 (s) 151.8 (s) 170.4 (s).

E) 88 ml of a 25%-strength aqueous ammonia solution was added to asolution of 16 g of the2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide obtained above in 88 ml ethanol, and the mixture was stirredfor 18 hours at room temperature. Then 200 ml dichloromethane and 50 mlmethanol were added thereto, and the mixture was stirred for a further15 minutes. Then 200 ml water was added and the mixture was againstirred for 15 minutes. The organic phase was separated and largelyevaporated at reduced pressure. The remaining residue was stirred with30 ml of ethyl acetate, filtered and dried on a rotary evaporator at 70°C. and 20 bar. 3.1 g2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide was obtained as grey solid, which was used without furtherpurification for the subsequent reaction.

¹H-NMR (400 MHz, DMSO-D₆) δ [ppm]: 1.08 (s, 6H) 1.35 (s, 6H) 1.60-1.95(12H) 2.63-2.83 (4H) 3.17 (d, 2H) 3.32-3.40 (4H) 3.49 (d, 2H) 4.90-4.98(2H) 5.32-5.38 (2H) 6.62 (d, 2H) 7.01 (dd, 2H) 7.05-7.18 (8H) 7.47 (d,2H) 8.32-8.35 (2H); ¹³C-NMR (101 MHz, DMSO-D₆) δ [ppm]: 18.6 (q) 19.9(t) 27.0 (q) 28.7 (t) 29.8 (t) 41.7 (t) 46.2 (d) 50.8 (d) 76.6 (d) 77.8(s) 115.6 (d) 125.5 (s) 125.6 (d) 125.7 (d) 126.5 (d) 127.9 (s) 128.0(d) 128.1 (d) 128.3 (d) 128.4 (d) 128.6 (d) 136.9 (s) 137.5 (s) 150.5(s) 169.8 (s).

F) 1.67 g 4-ethyl benzenesulfonyl chloride was added dropwise to asolution of 3.75 g of the2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylacetamide obtained above and 8.4 ml triethylamine in 160 mldichloromethane. In addition 5 ml of dimethyl formamide (=DMF) wasadded, and the resulting mixture was stirred for 18 hours at roomtemperature. Then 100 ml water was added, and the mixture was stirredfor another 5 minutes. The organic phase was separated, and the solventwas evaporated at reduced pressure. The remaining residue waschromatographed on silica gel (mobile phase: ethylacetate/cydohexane/methanol 110:140:2 v/v/v), and the product phaseswere combined and reduced in volume. The residue was stirred withpetroleum ether/diethyl ether 10:1 v/v. The resulting crystals wereremoved by suction and dried on a rotary evaporator at 40° C. and 25bar. 2.3 g of the title compound was obtained as colorless crystals.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: m 1.14 (s, 3H) 1.16 (s, 3H) 1.26 (t,3H) 1.28 (t, 3H) 1.44 (s, 6H) 1.60-1.85 (8H) 1.95-2.08 (2H) 2.66-2.83(8H) 3.18-3.33 (6H) 3.53-3.63 (2H) 4.18-4.28 (2H) 5.02-5.13 (2H)5.26-5.37 (2H) 5.52-5.60 (2H) 6.54 (d, 2H) 6.66-6.71 (2H) 6.95-7.19 (m,10H) 7.34-7.39 (4H) 7.85-7.92 (4H); ¹³C-NMR (101 MHz, CDCl₃) δ [ppm]:15.1 (q) 18.4 (q) 20.1 (t) 26.6 (q) 28.8 (t) 29.2 (t) 30.2 (t) 42.9 (t)47.7 (d) 47.8 (d) 55.1 (d) 74.9 (d) 75.0 (d) 78.6 (s) 78.7 (s) 118.0 (d)121.0 (s) 126.2 (d) 126.3 (d) 127.2 (s) 127.4 (d) 128.2 (d) 128.8 (d)128.9 (d) 129.2 (d) 129.3 (d) 130.3 (d) 136.5 (s) 137.6 (s) 150.3 (s)152.3 (s) 170.3 (s).

EXAMPLE 22-((3S,4R)-4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-[(1R)-1,2,3,4-tetrahydronaphth-1-yl]acetamide

A) 24.5 g CDl, 30 g 2,2-(dimethyl-2H-chromen-6-yl)acetic acid (forpreparation see Example 1B)) and 22.8 ml(1R)-1,2,3,4-tetrahydro-1-naphthylamine were reacted according to theprocedure set forth in Example 1C). 49 g2-(2,2-dimethyl-2H-chromen-6-yl)-N-[(1R)-1,2,3,4-tetrahydronaphth-1-yl]acetamidewas obtained as colorless crystals, which was used without furtherpurification for the subsequent reaction.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.41 (s, 6H) 1.60-1.85 (3H) 1.98-2.08(1H) 2.65-2.80 (2H) 3.45-3.55 (2H) 5.12-5.20 (1H) 5.60 (d, 1H) 5.66 (d,1H) 6.26 (d, 1H) 6.71 (d, 1H) 6.86 (d, 1H) 6.96 (dd, 1H) 7.02-7.07 (1H)7.08-7.17 (3H); ¹³C-NMR (101 MHz, CDCl₃) δ [ppm]: 20.2 (t) 28.0 (q, 2 C)29.2 (t) 30.3 (t) 43.2 (t) 47.7 (d) 76.3 (s) 116.8 (d) 121.7 (s) 122.0(d) 126.2 (d) 126.9 (s) 127.2 (d) 128.2 (d) 129.1 (d) 129.8 (d) 131.3(d) 136.7 (s) 137.5 (s) 152.2 (s) 170.7 (s).

B) 5 g (S,S)-manganese-(III)-salen and 7 g pyridine-N-oxide were addedto a solution of 44 g of the2-(2,2-dimethyl-2H-chromen-6-yl)-N-[(1R)-1,2,3,4-tetrahydronaphth-1-yl]acetamideobtained above in 800 ml dichloromethane. The resulting receivingsolution was cooled to 0° C., and a mixture of 660 ml of an aqueoussodium hypochlorite solution (Cl>13%) and 88 ml of a 9%-strength aqueoussolution of Na₂HPO₄ were added over 45 minutes. Stirring was continuedfor a further 3 hours at 0° C., then the organic phase was separated andstirred for 1 hour with 500 g Celite® 503. The solid was filtered outand the filtrate was washed with dichloromethane until it was colorless.The filtrate was evaporated to dryness at reduced pressure. 40 g2-[(1aS,7bS)-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl]-N-1,2,3,4-tetrahydronaphth-1-ylacetamide was obtained as crude oil, which was used without furtherpurification or characterization for the subsequent reaction.

C) 40 g of the2-[(1aS,7bS)-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl]-N-1,2,3,4-tetrahydronaphth-1-ylacetamide obtained above and 250 ml of a 25%-strength aqueous ammoniasolution were reacted in a manner corresponding to the procedure ofExample 1E). Chromatography of the crude product on silica gel (mobilephase: dichloromethane/methanol/25%-strength aqueous ammonia solution(75:50:2 v/v/v)) yielded 13.2 g2-[(3S,4R)-4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl]-N-[(1R)-1,2,3,4-tetrahydronaphth-1-yl]acetamideas oil, which was used without further purification for the subsequentreaction.

¹H-NMR (400 MHz, DMSO-D₆) δ [ppm]: 1.08 (s, 6H) 1.35 (s, 6H) 1.60-1.95(12H) 2.63-2.83 (4H) 3.17 (d, 2H) 3.32-3.40 (4H) 3.49 (d, 2H) 4.90-4.98(2H) 5.32-5.38 (2H) 6.62 (d, 2H) 7.01 (dd, 2H) 7.05-7.18 (8H) 7.47 (d,2H) 8.32-8.35 (2H); ¹³C-NMR (101 MHz, DMSO-D₆) δ [ppm]: 18.6 (q) 19.9(t) 27.0 (q) 28.7 (t) 29.8 (t) 41.7 (t) 46.2 (d) 50.8 (d) 76.6 (d) 77.8(s) 115.6 (d) 125.5 (s) 125.6 (d) 125.7 (d) 126.5 (d) 127.9 (s) 128.0(d) 128.1 (d) 128.3 (d) 128.4 (d) 128.6 (d) 136.9 (s) 137.5 (s) 150.5(s) 169.8 (s).

D) 5.94 ml 4-ethyl benzenesulfonyl chloride, 13.2 g of the2-[(3S,4R)-4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl]-N-[(1R)-1,2,3,4-tetrahydronaphth-1-yl]acetamideobtained above, 88 ml triethylamine and 4 ml dimethyl formamide werereacted in a manner corresponding to the procedure of Example 1F). 6.2 gof the title compound was obtained as solid, amorphous foam.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.15 (s, 3H) 1.26 (t, J=7.6 Hz, 3H)1.45 (s, 3H) 1.60-1.85 (3H) 2.01 (m, 1H) 2.65-2.82 (4H) 3.20-3.33 (3H)3.58 (dd, J=9.0, 3.0 Hz, 1H) 4.23 (dd, J=9.0, 8.7 Hz, 1H) 5.04 (m, 1H)5.16 (d, J=8.7 Hz, 1H) 5.51 (d, J=8.5 Hz, 1H) 6.54 (d, J=2.0 Hz, 1H)6.68 (d, J=8.4 Hz, 1H) 6.98 (dd, J=8.4, 2.0 Hz, 1H) 6.95-7.19 (4H) 7.37(m, 2H) 7.87 (m, 2H); ¹³C-NMR (101 MHz, CDCl₃) δ [ppm]: 15.1 (q) 18.4(q) 20.1 (t) 26.6 (q) 28.9 (t) 29.2 (t) 30.2 (t) 43.0 (t) 47.8 (d) 55.1(d) 75.0 (d) 78.7 (s) 118.0 (d) 121.1 (s) 126.2 (d) 127.3 (s) 127.4 (d,3 C) 128.2 (d) 128.7 (d) 129.0 (d, 2 C) 129.3 (d) 130.4 (d) 136.5 (s)137.6 (s) 137.7 (s) 150.4 (s) 152.3 (s) 170.3 (s); [α]_(D) ²⁰=−8.3°(c=0.1, MeOH).

EXAMPLE 3N-benzyl-2-{4-[[(4-ethylphenyl)sulfonyl](neopentyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}acetamide

A) 16.2 g of CDl dissolved in 300 ml tetrahydrofuran (THF) was slowlyadded to a solution of 19.7 g 2,2-dimethyl-2H-chromen-6-yl)acetic acid(for preparation see Example 1B)) in 300 ml THF and stirred for 10minutes at room temperature. 10.9 ml benzylamine was added slowlydropwise to this receiving solution, and the resulting mixture wasstirred for 1 hour. The solvent was largely evaporated at reducedpressure, and the remaining residue was extracted once with 500 ml of amixture of ethyl acetate and water (2:3 v/v). The organic phase waslargely evaporated at reduced pressure, and the remaining residue waschromatographed on silica gel (mobile phase: EA/cyclohexane 1:1 v/v).Drying of the product fractions on a rotary evaporator at 70° C. and 20bar yielded 28 g N-benzyl-2-(2,2-dimethyl-2H-chromen-6-yl)acetamide asoil, which was used without further purification or characterization forthe subsequent reaction.

B) 980 ml of a saturated aqueous sodium hydrogen carbonate solution wasadded to a solution of 28 g of theN-benzyl-2-(2,2-dimethyl-2H-chromen-6-yl)acetamide obtained above in 480ml dichloromethane. A total of 44.1 g MCPBA in three 14.7 g portions wasadded to this receiving solution at 5 min. intervals, and the mixturewas stirred for 18 hours at room temperature. The organic phase wasseparated, extracted once with 200 ml of a saturated aqueous sodiumhydrogen carbonate solution, and the organic phase was thensubstantially completely evaporated at reduced pressure. 35 gN-benzyl-2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)acetamidewas obtained as crude oil, which was used without further purificationor characterization for the subsequent reaction.

C) 250 ml of a 25%-strength aqueous ammonia solution was added to asolution of 35 g of theN-benzyl-2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)acetamideobtained above in 250 ml ethanol, and the mixture was stirred for 18hours at room temperature. The reaction mixture was poured into 500 mlwater and extracted with 250 ml dichloromethane. The organic phase wasseparated, dried over sodium sulfate and largely evaporated underreduced pressure. 200 ml diethyl ether was added to the remainingresidue. The crystals produced after a while were removed by suction anddried on a rotary evaporator at 60° C. and 20 bar. 11 g2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-benzylacetamidewas obtained as grey solid, which was used without further purificationor characterization for the subsequent reaction.

D) 4 ml of trimethylacetaldehyde was added to a solution of 11 g of the2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-benzylacetamideobtained above in 200 ml methanol. 2.44 g of NaBH₃CN was added inseveral portions, and the resulting suspension was stirred for 2 hoursat 50° C. After cooling to room temperature, the reaction mixture waspoured into 200 ml water. The aqueous phase was extracted once with 150ml EA, the combined organic phases were dried over sodium sulfate, andthe solvent was largely evaporated at reduced pressure. Chromatographyof the remaining residue on silica gel (mobile phase: ethylacetate/cyclohexane 1:1 v/v) and drying of the product fractions on arotary evaporator yielded 10.8 gN-benzyl-2-[3-hydroxy-2,2-dimethyl-4-(neopentylamino)-3,4-dihydro-2H-chromen-6-yl]acetamideas colorless oil.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 1.15 (s, 3H) 1.25 (t, 3H) 1.43 (s, 3H)2.70 (q, 2H) 3.18-3.31 (3H) 3.55 (dd, 1H) 4.22 (dd, 1H) 4.30 (d, 2H)5.51 (d, 1H) 5.81 (t, 1H) 6.56 (d, 1H) 6.67 (d, 1H) 6.96 (dd, 1H) 7.15(m, 2H) 7.21-7.30 (3H) 7.32 (m, 2H) 7.84 (m, 2H); ¹³C-NMR (101 MHz,CDCl₃) δ [ppm]: 15.1 (q) 18.5 (q) 26.6 (q) 28.8 (t) 42.7 (t) 43.5 (t)55.1 (d) 74.8 (d) 78.7 (s) 117.9 (d) 121.2 (s) 127.0 (s) 127.4 (d, 2 C)127.5 (d, 3 C) 128.7 (d, 2 C) 128.9 (d, 3 C) 130.4 (d) 137.6 (s) 138.1(s) 150.2 (s) 152.3 (s) 171.0 (s).

EXAMPLE 4N-benzyl-2-{4-[[(4-ethylphenyl)sulfonyl](neopentyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}acetamide

4.1 ml 4-ethyl benzenesulfonyl chloride was added dropwise to a solutionof 10.8 g of theN-benzyl-2-[3-hydroxy-2,2-dimethyl-4-(neopentylamino)-3,4-dihydro-2H-chromen-6-yl]acetamideobtained above in Example 3 and 5 ml triethylamine in 100 mldichloromethane. Dichloromethane was immediately substantiallycompletely evaporated at reduced pressure, and the resulting reactionmixture was stirred for 90 minutes at 65° C. and 180 bar. The entirebatch was poured into 150 ml water, and the aqueous phase was extractedonce with 200 ml ethyl acetate. The solvent was largely evaporated atreduced pressure, the remaining residue was dried over sodium sulfate,and the remaining residue was chromatographed on silica gel (mobilephase: petroleum ether/ethyl acetate 3:1 v/v). Drying the productfractions in an oil pump vacuum yielded 3.6 g of the title compound (2conformers) as colorless oil.

¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 0.75 (s, 9H) 1.15 (s, 3H) 1.26 (t, 3H)1.46 (s, 3H) 2.36 (1H) 2.65-2.75 (2H) 2.90-3.40 (4H) 3.86 (d,d 1H) 4.39(d, 2H) 4.76 (d, 1H) 5.50 (t, 1H) 6.48 (1H) 6.73 (d, 1H) 7.03 (dd, 1H)7.15-7.35 (7H) 7.81 (m, 2H) major; ¹H-NMR (400 MHz, CDCl₃) δ [ppm]: 0.86(s, 9H) 1.19 (s, 3H) 1.24 (t, 3H) 1.51 (s, 3H) 2.65-2.75 (2H) 2.81 (d,1H) 3.25-3.60 (4H) 4.25-4.61 (4H) 4.60 (d,d 1H) 5.87 (t, 1H) 6.73 (d,1H) 6.96 (dd, 1H) 7.15-7.35 (8H) 7.66 (m, 2H) minor; ¹³C-NMR (101 MHz,CDCl₃) δ [ppm]: 15.1 (q) 17.9 (q) 27.0 (q) 28.8 (q, 3C) 28.8 (t) 32.0(s) 43.0 (t) 43.7 (t) 56.3 (t) 59.0 (d) 71.2 (d) 79.1 (s) 118.4 (d)120.7 (s) 127.0-130.4 (12C) 137.2 (s) 138.1 (s) 150.4 (s) 153.0 (s)170.7 (s) major; ¹³C-NMR (101 MHz, CDCl₃) δ [ppm]: 15.1 (q) 18.6 (q)27.2 (q) 28.0 (q, 3C) 28.8 (t) 33.5 (s) 43.3 (t) 43.6 (t) 63.0 (t) 63.4(d) 73.2 (d) 78.8 (s) 118.0 (d) 122.0 (s) 125.7-129.8 (12C) 137.3 (s)138.3 (s) 150.2 (s) 151.8 (s) 171.3 (s) minor.

EXAMPLE 5N-(4-chlorobenzyl)-2-(3-hydroxy-2,2-dimethyl-4-{[(3-methylphenyl)sulfonyl]amino}-3,4-dihydro-2H-chromen-6-yl)acetamide

A) 175.6 g methyl-4-hydroxyphenylacetate and 128.9 g phenylboronic acidwere added to 3.5 l m-xylene. 88.9 g 3-methylbut-2-enal, and 130 ml ofglacial acetic acid were added to this mixture. The mixture was heatedto 140° C. in a Dean-Stark apparatus under a nitrogen atmosphere untilapproximately 70% of the phenol had reacted (approximately 48-72 hours).Then the reaction mixture was allowed to cool to room temperature, themixture was filtered, and the solvent was evaporated at reducedpressure. The remaining residue was dissolved in a 1:1 mixture oftetrahydrofuran (THF) and a 25%-strength aqueous ammonia solution (v/v)and stirred for 2 hours. The THF was largely evaporated off at reducedpressure and ethyl acetate was added. The organic phase was separated,washed in succession with an aqueous 1 N NaOH and a saturated aqueouscommon salt solution and finally dried over sodium sulfate. The solventwas largely evaporated at reduced pressure, and the remaining residuewas chromatographed on silica gel (mobile phase: n-hexane/EA 15:1 to10:1 v/v). Drying of the product fractions in an oil pump vacuum yielded106 g methyl-(2,2-dimethyl-2H-chromen-6-yl)acetate as pale yellow oil,which was used without further characterization for the subsequentreaction.

B) 106 g of the methyl-(2,2-dimethyl-2H-chromen-6-yl)acetate obtainedabove was dissolved in 900 ml THF. A solution of 57.6 g LiOH in 900 mlwater was added to this receiving solution, and the mixture was stirredfor 16 hours at room temperature. The THF was largely evaporated atreduced pressure, and the aqueous residue was acidulated by addition ofan aqueous 6N hydrochloric acid solution. The aqueous phase wasextracted with ethyl acetate, and the combined organic phases werewashed in succession with a saturated aqueous common salt solution andwith water. The organic phase was dried over sodium sulfate, and thesolvent was then substantially completely evaporated in a vacuum. 97.6 g2,2-(dimethyl-2H-chromen-6-yl)-acetic acid was obtained, which was usedwithout further purification or characterization for the subsequentreaction.

C) 14.0 g of the 2,2-(dimethyl-2H-chromen-6-yl)acetic acid obtainedabove and 13.54 g EDC×HCl were dissolved in dichloromethane at roomtemperature. 10.0 g of 4-chlorobenzylamine was added dropwise to thisreceiving solution with stirring, and the mixture was stirred for 16hours at room temperature. Then the reaction mixture was washed insuccession with water, 1N aqueous hydrochloric acid solution andsaturated aqueous common salt solution, and the organic phase was driedover sodium sulfate. Evaporation of the solvent at reduced pressure anddrying of the remaining residue in an oil pump vacuum yielded 21.92 g ofthe crude N-4-chlorobenzyl-2-(2,2-dimethyl-2H-chromen-6-yl)acetamide,which was used without further purification or characterization for thesubsequent reaction.

D) 700 ml of a saturated aqueous sodium hydrogen carbonate solution wasadded to a solution of 21.92 g of theN-4-chlorobenzyl-2-(2,2-dimethyl-2H-chromen-6-yl)acetamide obtainedabove in 600 ml dichloromethane. A total of 31.6 g MCPBA (72%) was addedin portions to this receiving solution and stirred for 16 hours at roomtemperature. The organic phase was separated, washed twice with a5%-strength aqueous sodium hydrogen carbonate solution, dried oversodium sulfate and substantially completely evaporated at reducedpressure. Drying in an oil pump vacuum yieldedN-(4-chlorobenzyl)-2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)acetamideas crude oil, which was used without further purification orcharacterization for the subsequent reaction.

E) TheN-(4-chlorobenzyl)-2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)acetamideobtained above was immediately poured into a mixture of so much ethanoland 25%-strength aqueous ammonia solution (6:5 v/v) that a 0.2 Msolution of the compound was obtained, and the resulting solution wasstirred for 16 hours at 50° C. Then the solution was allowed to cool toroom temperature, and the solvent was largely evaporated at reducedpressure. The remaining residue was chromatographed on silica gel(mobile phase: gradient dichloromethane/methanol/25%-strength aqueousammonia solution 97.5:2:0.5 to 90:9.5:0.5 v/v/v). Drying of the productfractions yielded 7.3 g2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-4-chlorobenzylacetamide, which was used without further purification for thesubsequent reaction. The other regioisomer,2-[3-amino-4-hydroxy-2,2-dimethylchromen-6-yl]-N-4-chlorobenzylacetamide, was not observed.

F) 15 mg PS-methylpiperidine and a solution of 6.0 mg3-methylbenzenesulfonyl chloride in 0.5 ml dichloromethane were added insuccession in a sample well of a sample plate for automatic parallelsynthesis to a solution of 9 mg of the2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-4-chlorobenzylacetamide obtained above in 0.5 ml dichloromethane. The sample plate wasshaken for 40 hours at room temperature, and then 20 mg AMPS was addedto the well. The plate was shaken for a further 16 hours at roomtemperature before the liquid reaction phase was separated from theresin, and the resin was washed twice with 1 ml portions ofdichloromethane. The solvent of the combined organic phases wasevaporated at reduced pressure, and the title compound was obtained in apurity of 95% (determination by HPLC-MS), [M+H]+529.

EXAMPLE 6N-butyl-2-{(4-[[(2,5-dimethoxyphenyl)sulfonyl](isobutyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}acetamide

A) 10.0 g 2,2-(dimethyl-2H-chromen-6-yl)acetic acid (for preparation seeExample 5B)), 9.67 g EDC×HCl and 5.41 g n-butylamine were reactedaccording to the procedure set forth in Example 5C). 17.5 g crudeN-(n-butyl)-2-(2,2-dimethyl-2H-chromen-6-yl)acetamide was obtained,which was used without further purification or characterization for thesubsequent reaction.

B) 700 ml of a saturated aqueous sodium hydrogen carbonate solution wasreacted with a solution of 17.5 g of theN-(n-butyl)-2-(2,2-dimethyl-2H-chromen-6-yl)acetamide obtained above in600 ml dichloromethane and 31.6 g MCPBA (72%) in a manner correspondingto the procedure of Example 5D). The crudeN-butyl-2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)acetamidewas obtained, which was used immediately without further purification orcharacterization for the subsequent reaction.

C) Then-butyl-2-(2,2-dimethyl-1a,7b-dihydro-2H-oxireno[c]chromen-6-yl)acetamideobtained above was immediately poured into a mixture of so much ethanoland 25%-strength aqueous ammonia solution (6:5 v/v) that a 0.2 Msolution of the compound was obtained and was processed further in amanner corresponding to the procedure of Example 5E). 7.4 g2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-(n-butyl)acetamidewas obtained, which was used without further purification for thesubsequent reaction. The other regioisomer,2-[3-amino-4-hydroxy-2,2-dimethylchromen-6-yl]-N-(n-butyl)acetamide, wasnot observed.

D) 610 mg of the2-(4-amino-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-(n-butyl)acetamideobtained above was dissolved in 20 ml tetrahydrofuran (THF) and 220 μlTMOF was added. Then 197 mg ethyl butyraldehyde was added to thisreceiving solution, and the reaction mixture was shaken for 16 hours atroom temperature. The solvent was removed at reduced pressure, theremaining residue was taken up with 20 ml methanol, 7.9 g PS—BH₄ wasadded, and the reaction mixture was shaken for a further 16 hours atroom temperature. The reaction mixture was then filtered, and thereactive resin was washed with methanol. The combined filtrates werelargely evaporated at reduced pressure, the remaining residue wasdissolved in 20 ml dichloromethane, and 0.4 equivalents of a knownpolymer-supported aldehyde (PS—CHO) and 0.6 equivalents of AMPS wereadded in succession. The mixture was shaken again for 16 hours at roomtemperature, the liquid phase was filtered off from the reactive resin,and the resin was subsequently washed with THF. The combined liquidorganic phases were evaporated at reduced pressure, and 572 mg of 95%pure (determination by HPLC)2-[4-(2-ethylbutylamino)-3-hydroxy-2,2-dimethylchromen-6-yl]-N-(n-butyl)acetamidewas obtained which was used without further purification orcharacterization for the subsequent reaction.

E) 20 mg PS-methylpiperidine resin and a solution of 37.1 mg3,5-dimethoxybenzenesulfonyl chloride in 0.4 ml dichloromethane wereadded successively to in a sample well of a sample plate for automaticparallel synthesis containing a solution of 14.8 mg of the2-[4-(2-ethylbutylamino)-3-hydroxy-2,2-dimethylchromen-6-yl]-N-(n-butyl)acetamideobtained above in 0.6 ml dichloromethane. The mixture was shaken for 168hours at room temperature, the resin was filtered out, and then 120 mgPS-AMPS was added to the filtrate. It was shaken for a further 16 hoursat room temperature before the liquid reaction phase was separated fromthe resin, and the resin was washed twice with 1 ml portions ofdichloromethane. The solvent of the combined organic phases wasevaporated at reduced pressure, and the title compound was obtained in apurity of 96% (determination by HPLC-MS), [M+H]+591.

The compounds of Formula I listed in the following Table 6 can also beprepared according to the processes described in the foregoing examplesor analogously thereto. TABLE 6 Further compounds of Formula I: Ex. No.R¹ R² R³ R⁴ R⁵ R⁶ *C-3 *C-4  7 Me Me 4-ethylphenyl neopentyl H benzyl SR  8 Me Me 4-ethylphenyl neopentyl H benzyl R S  9 Me Me 4-ethylphenyl HH (S)-tetra- S R hydronaphth-1-yl 10 Me Me 4-ethylphenyl neopentyl Hphenylethyl trans 11 Me Me 4-ethylphenyl H H benzyl S R 12 Me Me4-ethylphenyl H H phenylethyl trans 13 Me Me 3-fluorophenyl H H(S)-tetra- trans hydronaphth-1-yl 14 Me Me phenyl H H (S)-tetra- transhydronaphth-1-yl 15 Me Me 4-methylphenyl H H (S)-tetra- transhydronaphth-1-yl 16 Me Me 4-ethylphenyl H —(CH₂)₂N—C₆H₅ trans 17 Me Me4-iodophenyl H n-butyl trans 18 Me Me 4-methylphenyl cyclopropylmethyl Hbenzyl trans 19 Me Me 4-methylphenyl 3-methylbutyl H benzyl trans 20 MeMe 2,5-dimethoxyphenyl 2-ethylbutyl H n-butyl trans 21 Me Me2,5-dimethoxyphenyl 2-ethylbutyl H 2-furylmethyl trans 22 Me Me3-methoxyphenyl n-pentyl H 1,2-dimethytpropyl trans 23 Me Me4-trifluoromethylphenyl 3-methylbutyl H benzyl trans 24 Me Me3-chloro-4-fluorophenyl 2-methylpropyl H n-propyl trans 25 Me Me2-naphthyl 3-methylbutyl H benzyl trans 26 Me Me 4-biphenyl3-methylbutyl H n-propyl trans 27 Me Me 3-methoxyphenyl 3-methylbutyl H4-chlorobenzyl transNotes to Table 6:trans = trans position of the substituents at C-3 and C-4, but mixtureof the stereoisomers; Me = methyl; “S” and “R” each relate to theabsolute configuration on the corresponding carbon.

EXAMPLE I Capsules Containing2-(4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphth-1-ylAcetamide

Capsules with the following composition per capsule were prepared:2-(4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2- 20 mgdimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4- tetrahydronaphth-1-ylacetamide Corn starch 60 mg Lactose 300 mg Ethyl acetate q.s.

The active substance, the corn starch and the lactose were processedinto a homogenous pasty mixture using the ethyl acetate. The paste wasground, and the resulting granules were placed on a suitable tray anddried at 45° C. in order to remove the solvent. The dried granules werepassed through a crusher and mixed in a mixer with the followingadditional auxiliaries: Talcum 5 mg Magnesium stearate 5 mg Corn starch9 mg and then filled into 400 mg capsules (=capsule size 0).

The foregoing description and examples have been set forth merely toillustrate the invention and are not intended to be limiting. Sincemodifications of the described embodiments incorporating the spirit andsubstance of the invention may occur to persons skilled in the art, theinvention should be construed broadly to include all variations withinthe scope of the appended claims and equivalents thereof.

1. A compound corresponding to formula I:

wherein R¹ is C₁₋₄-alkyl, R² is C₁₋₄-alkyl, R³ is phenyl which isoptionally substituted 1 or 2 times by halogen, C₁₋₄-alkyl, C₁₋₄-alkoxyor trifluoromethyl; naphthyl or biphenyl, R⁴ is hydrogen; C₁₋₆-alkyl orC₃₋₇-cycloalkyl-C₁₋₄-alkyl, R⁵ is hydrogen, and R⁶ is C₁₋₆-alkyl;phenyl-C₁₋₄-alkyl, the phenyl group of which is optionally substitutedonce by halogen; furyl-C₁₋₄-alkyl or tetrahydronaphthyl, or R⁵ and R⁶,together with the nitrogen to which they are bonded, form a piperazinering which may optionally be substituted by phenyl.
 2. A compoundaccording to claim 1, wherein R¹ and R² are each methyl.
 3. A compoundaccording to claim 1, wherein R³ is phenyl or mono-substituted phenyl.4. A compound according to claim 1, wherein R⁴ is hydrogen, C₁₋₆alkyl orcyclopropyl-C₁₋₄-alkyl.
 5. A compound according to claim 1, wherein R⁶is phenyl-C₁₋₄-alkyl or tetrahydronaphthyl.
 6. A compound according toclaim 1, wherein in the pyran ring the C-3 carbon bearing the hydroxysubstituent is in the S configuration and the C-4 carbon bearing thenitrogen-containing substituent is in the R configuration.
 7. A compoundaccording to claim 1, selected from the group consisting of:2-(4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphthalen-1-ylacetamide;2-((3S,4R)-4-{[(4-ethylphenyl)sulfonyl]amino}-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-[(1R)-1,2,3,4-tetrahydronaphthalen-1-yl]acetamide;N-benzyl-2-{4-[[(4-ethylphenyl)sulfonyl](neopentyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}acetamide;2-{4-[[(4-ethylphenyl)sulfonyl](neopentyl)amino]-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl}-N-(2-phenylethyl)acetamide,and P02-(4-([(4-methylphenyl)sulfonyl]amino)-3-hydroxy-2,2-dimethyl-3,4-dihydro-2H-chromen-6-yl)-N-1,2,3,4-tetrahydronaphthalen-1-ylacetamide.
 8. A pharmaceutical composition comprising a compoundaccording to claim 1, and at least one pharmaceutical auxiliary orcarrier.
 9. A method of treating a disease state in a patient sufferingfrom said disease state, said method comprising administering apharmaceutically effective amount of at least one compound according toclaim 1 to said patient, wherein said disease state is selected from thegroup consisting of cardiovascular diseases, proliferative diseases,chronic inflammatory diseases and autoimmune diseases.
 10. A process forpreparing a compound corresponding to Formula I:

wherein R¹ is C₁₋₄-alkyl, R² is C₁₋₄-alkyl, R³ is phenyl which isoptionally substituted 1 to 2 times by halogen, C₁₋₄-alkyl, C₁₋₄-alkoxyor trifluoromethyl; naphthyl or biphenyl, R⁴ is hydrogen; C₁₋₆-alkyl orC₃₋₇cycloalkyl-C₁₋₄-alkyl, R⁵ is hydrogen, and R⁶ is C₁₋₆-alkyl;phenyl-C₁₋₄-alkyl, the phenyl group of which is optionally substitutedonce by halogen; furyl-C₁₋₄-alkyl or tetrahydronaphthyl, or R⁵ and R⁶,together with the nitrogen to which they are bonded, form a piperazinering which may optionally be substituted by phenyl, said methodcomprising reacting a compound corresponding to formula II:

wherein R¹, R², R⁴, R⁵ and R⁶ have the above meanings, with a compoundcorresponding to formula III:X—SO₂—R³  III wherein R³ has the above meaning, and X is a cleavableleaving group.
 11. A compound corresponding to formula II:

wherein R¹ is C₁₋₄-alkyl, R² is C₁₋₄-alkyl, R⁴ is hydrogen; C₁₋₆-alkylor C₃₋₇-cycloalkyl-C₁₋₄-alkyl, R⁵ is hydrogen, and R⁶ is C₁₋₆-alkyl;phenyl-C₁₋₄-alkyl, the phenyl group of which is optionally substitutedonce by halogen; furyl-C₁₋₄-alkyl or tetrahydronaphthyl, or R⁵ and R⁶,together with the nitrogen to which they are bonded, form a piperazinering which may optionally be substituted by phenyl.